/* Copyright (c) 2001-2011, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.lib;

import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;

/**
 * A wrapper for OutputStream
 *
 * @author Fred Toussi (fredt@users dot sourceforge.net)
 * @version 2.0.1
 * @since 1.9.0
 */
public class DataOutputStream extends java.io.BufferedOutputStream {

    byte[] tempBuffer = new byte[8];

    public DataOutputStream(OutputStream stream) {
        super(stream, 8);
    }

    public final void writeByte(int v) throws IOException {
        write(v);
    }

    public final void writeInt(int v) throws IOException {

        int count = 0;

        tempBuffer[count++] = (byte) (v >>> 24);
        tempBuffer[count++] = (byte) (v >>> 16);
        tempBuffer[count++] = (byte) (v >>> 8);
        tempBuffer[count++] = (byte) v;

        write(tempBuffer, 0, count);
    }

    public final void writeLong(long v) throws IOException {
        writeInt((int) (v >>> 32));
        writeInt((int) v);
    }

    public void writeChar(int v) throws IOException {

        int count = 0;

        tempBuffer[count++] = (byte) (v >>> 8);
        tempBuffer[count++] = (byte) v;

        write(tempBuffer, 0, count);
    }

    public void writeChars(String s) throws IOException {

        int len = s.length();

        for (int i = 0; i < len; i++) {
            int v     = s.charAt(i);
            int count = 0;

            tempBuffer[count++] = (byte) (v >>> 8);
            tempBuffer[count++] = (byte) v;

            write(tempBuffer, 0, count);
        }
    }

    public void writeChars(char[] c) throws IOException {
        writeChars(c, c.length);
    }

    public void writeChars(char[] c, int length) throws IOException {

        for (int i = 0; i < length; i++) {
            int v     = c[i];
            int count = 0;

            tempBuffer[count++] = (byte) (v >>> 8);
            tempBuffer[count++] = (byte) v;

            write(tempBuffer, 0, count);
        }
    }

    public void write(Reader reader, long length) throws IOException {

        InputStream inputStream = new ReaderInputStream(reader);

        write(inputStream, length * 2);
    }

    public void write(InputStream inputStream,
                      long length) throws IOException {

        CountdownInputStream countStream =
            new CountdownInputStream(inputStream);

        countStream.setCount(length);

        byte[] data = new byte[1024];

        while (true) {
            int count = countStream.read(data);

            if (count < 1) {
                if (countStream.getCount() != 0) {
                    throw new EOFException();
                }

                break;
            }

            write(data, 0, count);
        }
    }
}
